Siemens MPS-12-220 Installation Instructions

Installation Instructions

Models MPS-12-220 and MPS-12-240

Power Supply Modules

OPERATION
The Model MPS-12-220 or MPS-12-240 from Siemens
Industry, Inc. is a high current power supply that
provides the MXL/MXLV System with primary 24 VDC
power. It is rated at 12 amps and is unfiltered and
unregulated. The MPS-12-220/240 provides only 6
amps when used with the MMB-1 or SMB-1. The
MPS-12-220/240 supplies the MXL Control Panel or
PSR-1 and its modules with the power required for
normal operation. The module incorporates a 5 amp
circuit-breaker on the primary input, a 15 amp fuse on
the 24V output, and a built-in AC line filter for surge
and noise suppression. The MPS-12-220/240 mounts
in an MXL enclosure backbox.
INSTALLATION
Always remove power before installation.
The installation kit for the MPS-12-220/240 includes
the following:
Four #10 nuts
Two #10 lockwashers
Two #10 flat washers
Two ¼" nuts
One 14 gauge green ground strap
The MPS-12-220 or MPS-12-240, depending on the
unit ordered, is designed to operate from either a 220
or 240 VAC, 50 or 60 Hz power source. Use a
separate or dedicated circuitbreaker. Wire in accor-
dance with local codes and Article 760 of the NEC,
NFPA 70, latest edition.
Run the earth ground from a suitable source to the
MPS-12-220/240. Check local requirements. Conduit
is not an acceptable conductor.
1. Make sure that the dedicated circuitbreaker for
the MPS-12-220/240 is turned off at the source.
Siemens Industry, Inc.
Building Technologies Division
Florham Park, NJ
P/N 315-092820-10
2. Place the mounting bracket for the MPS-12-220/
240 over the two studs provided in the backbox.
(Refer to Figure 1.)
3. Secure the MPS-12-220/240 to the backbox by
slipping the flat washers, then the lockwashers,
and finally the nuts over the two studs. Tighten
them securely.
4. Connect the source to the MPS-12-220/240:
Black (hot)
White (hot)
Green (earth ground)
5. Install the 14 gauge green ground strap spade lug
side to Terminal 3 (green, earth ground) of the
MPS-12-220/240. Secure the ring lug side of the
ground strap to the nearest available stud in the
enclosure. The stud size may vary depending on
the actual system modules and enclosure used.
Because the stud may be either a #10 thread or ¼"
thread, nuts for both have been provided. The
ground strap provided is long enough for all
applications and the ring lug is good for both #10
and ¼" studs. If possible, install the ring lug under
one of the lockwashers and nuts which secure the
MPS-12-220/240 itself.
6. When used with a PSR-1:
Connect the 8-wire cable coming from the
MPS-12-220/240 to the PSR-1 at P10.
When used with an MMB-1 or SMB-1:
Connect the CIA-12 Cable Adapter, P/N 500-
692825, to the 8-wire cable coming from the MPS-
12-220/240, and then to the MMB-1 or SMB-1 at
P1.
When used with an MMB-2/3 or SMB-2:
Connect the 8-wire cable coming from the
MPS-12-220/240 to the MMB-2/3 or SMB-2 at P14.
Siemens Building Technologies, Ltd.
Fire Safety & Security Products
2 Kenview Boulevard
Brampton, Ontario
L6T 5E4 Canada
Terminal
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